Philippines. Ministry of Trade and Industry. Planning Service. (1983). Philippine foreign trade. 1981-1982. Planning Service,Ministry of Trade Industry.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিPhilippines. Ministry of Trade and Industry. Planning Service. Philippine Foreign Trade. 1981-1982. Makati, Metro Manila: Planning Service,Ministry of Trade Industry, 1983.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিPhilippines. Ministry of Trade and Industry. Planning Service. Philippine Foreign Trade. 1981-1982. Planning Service,Ministry of Trade Industry, 1983.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.